To whoever does this, you are a horrible person.

Exhibit 1

No, griefing is when someone takes an action where they gain nothing out of it. In OPs case if they would've sold the moonshine, it'd be totally legit but since they killed OP and destroyed the wagon it's just griefing.

Exhibit 2

Do moonshine missions work the same, so that other players can rob you as in "A rival is doing a mission blabla" which turns the guy doing the mission into an objective? In that case you're perfectly right.

My point being, you gave me a definite answer then backtracked stating you don't know anything. So my ending is... I gave you the definition which you were wrong on and you know zero about Moonshining so you can't comment on what is or isn't griefing.

I answered above before you asked.

/r/RedDeadOnline Thread Parent